Science (English Medium) Class 11 - CBSE Question Bank Solutions for Chemistry

Which of the following is not correct?

Given that ∆H = 0 for mixing of two gases. Explain whether the diffusion of these gases into each other in a closed container is a spontaneous process or not?

Identify the state and path functions out of the following:

1. Enthalpy
2. Entropy
3. Heat
4. Temperature
5. Work
6. Free energy

What will be the correct order of vapour pressure of water, acetone and ether at 30°C. Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?

Calculate the volume of water required to dissolve 0.1 g lead (II) chloride to get a saturated solution. \[\ce{(K_{sp} of PbCl2}\] = 3.2 × 10^–8, atomic mass of \[\ce{Pb = 207 u}\]).

During hearing of a court case, the judge suspected that some changes in the documents had been carried out. He asked the forensic department to check the ink used at two different places. According to you which technique can give the best results?

The principle involved in paper chromatography is ______.

What will be the product obtained as a result of the following reaction and why?

Suggest a route for the preparation of nitrobenzene starting from acetylene?

Match the following reactants in Column I with the corresponding reaction products in Column II.

Which atom is indicated by the following configuration?

[He] 2s¹

Which atom is indicated by the following configuration?

[Ne] 3s² 3p³

Which atom is indicated by the following configuration? 

[Ar] 4s² 3d¹.

An atomic orbital has n = 3. What are the possible values of l and m_l?

List the quantum numbers (m_l and l) of electrons for 3d orbital.

 Which of the following orbitals are possible?

1p, 2s, 2p and 3f

Indicate the number of unpaired electrons in a P.

Indicate the number of unpaired electrons in Si.

Indicate the number of unpaired electrons in Cr.

Indicate the number of unpaired electrons in Fe.